Handcuff ring with mechanism for enhanced locking and handcuffs having the same

Abstract

A handcuff ring with mechanism for enhanced locking includes a stationary strand and a movable strand. The stationary strand is provided therein with an engaging element, a stop portion, and an elastic element that is located between, and can push respectively, the engaging element and the stop portion. At least one locking groove is formed on the front side and/or the rear side of the stationary strand, and a thin rod, when being inserted from outside into the locking groove, can press an end of the stop portion to displace the stop portion toward a keyhole, so that the abutting portions of the stop portion and the engaging element abut against each other. Accordingly, through the locking groove(s) located on the front side and/or the rear side of the handcuff ring, a user can conveniently push the stop portion by the thin rod to finish the enhanced locking process.

What is claimed is: 
     
       1. A handcuff ring with mechanism for enhanced locking for a handcuff, the handcuff ring comprising:
 a stationary strand formed with an opening on an inner side thereof, a receiving space therein that extends from the opening, a keyhole on a front side thereof, at least one locking groove on at least one of the front side and the rear side and sunken towards the receiving space along an axial direction, and an insertion allowing mechanism other than the at least one locking groove that protrudes towards the receiving space along a protruding direction or is sunken along a depressing direction away from the receiving space, wherein each of the protruding direction and the depressing direction of the insertion allowing mechanism is different from the axial direction of the at least one locking groove, and the opening and the keyhole communicate with the receiving space separately, and the locking groove communicates with the receiving space; 
 a movable strand having one end pivotally connected to the stationary strand and an outer periphery of the other end thereof formed with a plurality of teeth, and configured to be rotated toward the opening to correspond the teeth to the opening; 
 an engaging element pivotally disposed in the receiving space with a top side thereof protrudingly formed with a first abutting portion, a bottom side thereof formed with a plurality of engaging teeth, and an end thereof that is adjacent to the keyhole protrudingly formed with a pushing portion; 
 an elastic element fixed in the receiving space and configured to:
 press against the engaging element through a bottom side of the elastic element; and 
 drive the engaging element to engage the engaging teeth with the teeth when the other end of the movable strand is inserted into the opening so as to lock the movable strand in the opening and form a closed ring; and 
 
 a stop portion movably positioned in the receiving space, having a first end corresponding to the locking groove, formed with a second abutting portion that is adjacent to a second end of the stop portion and extending toward the engaging element, and configured to be displaced toward the keyhole until the second abutting portion is displaced to be located above, and abuts against, the first abutting portion when a thin rod is inserted into the locking groove to push the first end of the stop portion, wherein the insertion allowing mechanism forms an insertion allowing space different from the at least one locking groove and whose boundary has a part facing and spaced apart from the first end of the stop portion, a transverse length of the insertion allowing space is less than a transverse length of the at least one locking groove, and the elastic element is configured to press against a bottom side of the stop portion through the top side of the elastic element. 
 
     
     
       2. The handcuff ring according to  claim 1 , wherein the insertion allowing mechanism forms the insertion allowing space between the first end of the stop portion and an inner wall of the stationary strand, and the insertion allowing space corresponds to the locking groove and has the transverse length less than the transverse length of the locking groove, so that the first end of the stop portion is pushed by the thin rod when the thin rod is inserted through the locking groove. 
     
     
       3. The handcuff ring according to  claim 2 , wherein the stationary strand comprises a first plate, a second plate, and a stationary base located between the first and second plates and concavely formed therein with the receiving space, and an inner wall of the stationary base is formed with a protrusion serving as the insertion allowing mechanism and configured to block the first end of the stop portion from lying against the inner wall of the stationary base so as to form the insertion allowing space. 
     
     
       4. The handcuff ring according to  claim 3 , wherein the locking groove is formed on at least one of the first plate and the second plate. 
     
     
       5. A handcuff, having at least two handcuff rings that are linked by a chain, wherein each of the handcuff rings is the handcuff ring according to  claim 4 . 
     
     
       6. A handcuff, having at least two handcuff rings that are linked by a chain, wherein each of the handcuff rings is the handcuff ring according to  claim 3 . 
     
     
       7. The handcuff ring according to  claim 2 , wherein the stationary strand comprises a first plate, a second plate, and a stationary base located between the first and second plates and concavely formed therein with the receiving space, the first plate is formed with the locking groove, and a side of the second plate that corresponds to the locking groove is protrudingly formed with a block that extends outward and serves as the insertion allowing mechanism, and is configured to block the first end of the stop portion from lying against the inner wall of the stationary base so as to form the insertion allowing space. 
     
     
       8. A handcuff, having at least two handcuff rings that are linked by a chain, wherein each of the handcuff rings is the handcuff ring according to  claim 7 . 
     
     
       9. The handcuff ring according to  claim 2 , wherein the stationary strand comprises a plate element formed with a through space for communicating with the receiving space and accommodating the stop portion, and an inner wall of the plate element that is adjacent to the locking groove is concavely formed with an insertion allowing groove having a longitudinal width less than a longitudinal width of the first end of the stop portion and serving as the insertion allowing mechanism to block the first end of the stop portion from extending into the insertion allowing groove by being blocked by inner wall portions of the plate element that are adjacent to the insertion allowing groove and from lying against the inner wall of the stationary base so as to form the insertion allowing space. 
     
     
       10. A handcuff, having at least two handcuff rings that are linked by a chain, wherein each of the handcuff rings is the handcuff ring according to  claim 9 . 
     
     
       11. A handcuff, having at least two handcuff rings that are linked by a chain, wherein each of the handcuff rings is the handcuff ring according to  claim 2 . 
     
     
       12. A handcuff, having at least two handcuff rings that are linked by a chain, wherein each of the handcuff rings is the handcuff ring according to  claim 1 .